心臓再同期療法の逆転リモジリングに対する効果と結果との関係: 多中心の自動除細動器移植試験: 心臓再同期療法の効果
Scott D Solomon1, Elyse Foster, Mikhail Bourgoun
1Cardiovascular Division, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115, USA. ssolomon@rics.bwh.harvard.edu
Circulation
|August 25, 2010
まとめ
心臓再同期療法 (CRT) とインプラント可能な心臓変圧器除細動器 (ICD) を併用すると,心不全患者の心臓機能とサイズを大幅に改善します. これらのポジティブなエコーカルディオグラフィの変化は,よりよい長期的な結果,死亡または心不全のイベントの減少と関連しています.
科学分野:
- 心臓病学 心臓病学
- 心不全管理について
- 医療機器技術 医療機器技術について
背景:
- 植入可能な心変圧器除細動器 (ICD) を用いた心臓再同期療法 (CRT) は,左心室機能不全と広いQRS複合体を持つ軽度の症状の心不全の患者にとって有望であることが示されています.
- 以前の研究では,CRTとICDがICD単独と比較して,死亡または心不全のリスクを減らすことが示されました.
研究 の 目的:
- MADIT-CRT試験の患者におけるエコーカルディオグラフィの変化を評価する.
- CRTとICDによる結果の改善が,心臓のサイズと機能の好ましい変化と関連しているかどうかを判断する.
主な方法:
- 1,820人の患者がランダムにCRTとICD,またはICD単独 (3:2比) に割り当てられました.
- エコーカルディオグラフィー研究は,1372人の患者で,ベースラインおよび12ヶ月間に行われました.
- 心臓のサイズとパフォーマンスの変化をグループ間で比較し,その後のアウトカムとの関係を評価した.
主要な成果:
- CRT+ICDグループは,ICDのみのグループと比較して,左心室末期ダイアストリック容量指数,左心室末期シストリック容量指数,左心室排泄分数,左心室容量指数,右心室分面積の変化においてより大きな改善を示した.
- 1年後の終結ダイアストリック容量の10%の減少は,その後の死亡または心不全のリスクの40%の減少と関連していました (P<0.001).
結論:
- CRTは,ICDのみの戦略と比較して,軽度の症状のある心不全患者の心臓のサイズとパフォーマンスを著しく改善します.
- 観察された心臓測定値の改善は,患者のアウトカムにおける利点を説明しました.
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